(19)

(11)

EP 2 956 670 A1

(12)

(43) Date of publication: 23.12.2015 Bulletin 2015/52 (21) Application number: 14701620.8 (22) Date of filing: 28.01.2014

(51) International Patent Classification (IPC):  F04B 37/14(2006.01) F04B 41/06(2006.01) F04B 41/02(2006.01) (86) International application number: PCT/GB2014/050209 (87) International publication number: WO 2014/125249 (21.08.2014 Gazette 2014/34)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME (30) Priority: 13.02.2013 GB 201302530 (71) Applicant: Edwards Limited Manor Royal Crawley West Sussex RH10 9LW (GB)	(72) Inventors: STONES, Ian David Crawley Sussex RH10 9LW (GB) GRAY, Malcolm William Burgess Hill West Sussex RH15 9TW (GB) PORT, Iain David Shoreham by Sea Sussex BN43 5RH (GB) (74) Representative: Norton, Ian Andrew et al Edwards Limited Manor Royal Crawley, West Sussex RH10 9LW Crawley, West Sussex RH10 9LW (GB)